Update what I said before...some more thoughts on this subject now that several months have passed....when I recently went back and tried my ego Tank/cartridges with my ego twists and increasing the voltage to get more flavor from them, now again I'm getting the sore tongue/irritations/super senstive tongue (not sure what to call it LOL) Yet when I use stardust clearomizers this was NOT happening...hmmmm I think I'm actually touching the tank cartridge with my tongue and while I don't think I feel juice on my tongue it must be getting on there. With a drip tip on a cartomizer or with my clearomizers, my tongue isn't touching anything.